Improvement in hot-water boilers for ranges



P. LESSON.

Hot-Water Boiler fer Ranges.

Patented Dec10,1872.

PATENT OFFICE.

PHILIP LESSON, OFNEWARK, NEW Jansen IMPROVEMENT IN HOT-WATERBOILERS FOR RANGES.

Specification forming part of Letters Patent No. 133,866, dated December 10, 1872.

To all whom it may concern:

Be it known that I, PHILIP LESSON, of Newark, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in Hot-Water Boilers for Ranges;

and I do hereby declare the following to be a full, clear, and exact description thereof, which will enablethose skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification, in which drawing- Figure 1 represents a vertical central section of my invention; and Fig. 2 is a horizonta-l section of the same in the plane in a, Fig. 1.

Similar letters indicate corresponding parts.

This invention relates to certain improvements on that class of hot-water boilers which I have described in my patent No. 123,269, dated January 30, 1872, and in which the body of the boiler is made of a thin sheet of copper strengthenedby a layer of wire wrapped around the same and attached thereto by solder. My improvement consists in a head and bottom plate for a hot-water boiler for kitchen-ranges, constructed of an inner layer of sheet-copper and an outer layer of sheet-iron, both layers being firmly united and then brought into the required shape in such a manner that with a comparatively thin sheet of copper at head or bottom of great strength can be produced; and, furthermore, in shaping said heads or bottoms dies can be used, while the heads or bottoms made of plain sheets of copper have to be spun upon a turning-lathe in order to impart to the copper the requisite degree of hardness.

In the drawing, the letter Adesignates the body of my boiler,'which is made of a comparatively thin sheet of copper, strengthened by a wire wrapped around it, and to which are secured a head, B, and a bottom plate, O.v Each of these parts'is made of a thin sheet,

a, of copper, strengthened by external layer b of sheet-iron, the sheet-copper and sheetiron being firmly united by solder, or in any other desirable manner, and then brought into the desired shape by suitable dies. If 'the head or bottom is made of sheet-copper alone a heavy sheet of copper must be taken in or der to obtain the required strength, and then the sheet-copper is brought in the required shape by spinning it up, since this operation is desirable to impart to the copper suflicient hardness for the occasion.

By using plates or sheets of copper and iron cured in position by means of solder, the boiler is strengthened both again st internal and against external pressure.

' What I claim as new, and desire to secure by Letters Patent, is-- p A bottom or top for a hotwater boiler made of a combined sheet of copper and iron, the copper being inside and the iron outside, substantially as shown and described.

- PHILIP LESSON.

Witnesses W. HAUFF, E. F. KAsTENHUBER. 

